/Engine/Source/Runtime/Slate/Public/Framework/Docking/TabManager.h
Return an array of all tab spawners that should have menu items in the main menu.
[TArray](API\Runtime\Core\Containers\TArray)< [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [FTabSpawnerEntry](API\Runtime\Slate\Framework\Docking\FTabSpawnerEntry) > > CollectSpawners()